<?php
/* --------------------------------------------------
 * browser.class.php
 * --------------------------------------------------
 *
 */

// Direct access protection
if( !defined( 'LIRIOPE' )) die( 'Direct access is not allowed.' );

class browser {

  static protected $built=FALSE;
  static protected $userAgent;
  static protected $name;
  static protected $shortname;
  static protected $version;
  static protected $shortver;
  static protected $platform;
  static protected $pattern;

  static function start() {
    $u_agent = $_SERVER['HTTP_USER_AGENT']; 
    $bname = 'Unknown';
    $platform = 'Unknown';
    $version= "";

    //First get the platform?
    if (preg_match('/linux/i', $u_agent)) {
      $platform = 'linux';
    }
    elseif (preg_match('/macintosh|mac os x/i', $u_agent)) {
      $platform = 'mac';
    }
    elseif (preg_match('/windows|win32/i', $u_agent)) {
      $platform = 'windows';
    }

    // Next get the name of the useragent yes seperately and for good reason
    if(preg_match('/MSIE/i',$u_agent) && !preg_match('/Opera/i',$u_agent)) 
    { 
      $bname = 'Internet Explorer'; 
      $ub = "MSIE"; 
    } 
    elseif(preg_match('/Firefox/i',$u_agent)) 
    { 
      $bname = 'Mozilla Firefox'; 
      $ub = "Firefox"; 
    } 
    elseif(preg_match('/Chrome/i',$u_agent)) 
    { 
      $bname = 'Google Chrome'; 
      $ub = "Chrome"; 
    } 
    elseif(preg_match('/Safari/i',$u_agent)) 
    { 
      $bname = 'Apple Safari'; 
      $ub = "Safari"; 
    } 
    elseif(preg_match('/Opera/i',$u_agent)) 
    { 
      $bname = 'Opera'; 
      $ub = "Opera"; 
    } 
    elseif(preg_match('/Netscape/i',$u_agent)) 
    { 
      $bname = 'Netscape'; 
      $ub = "Netscape"; 
    } 

    // finally get the correct version number
    $known = array('Version', $ub, 'other');
    $pattern = '#(?<browser>' . join('|', $known) .
      ')[/ ]+(?<version>[0-9.|a-zA-Z.]*)#';
    if (!preg_match_all($pattern, $u_agent, $matches)) {
      // we have no matching number just continue
    }

    // see how many we have
    $i = count($matches['browser']);
    if ($i != 1) {
      //we will have two since we are not using 'other' argument yet
      //see if version is before or after the name
      if (strripos($u_agent,"Version") < strripos($u_agent,$ub)){
        $version= $matches['version'][0];
      }
      else
      {
        $version= $matches['version'][1];
      }
    }
    else
    {
      $version= $matches['version'][0];
    }

    // check if we have a number
    if ($version==null || $version=="") {$version="?";}

    self::$userAgent = $u_agent;
    self::$name      = $bname;
    self::$shortname = strtolower($ub);
    self::$version   = $version;
    self::$shortver  = substr($version, 0,strpos($version,'.'));
    self::$platform  = $platform;
    self::$pattern   = $pattern;

    self::$built = TRUE;
  } 

  static function getBodyClass() {
    if( !self::$built ) self::start();
    return self::$shortname . ' ' . self::$shortname . self::$shortver . ' ' . self::$platform;
  }

  static function areWeHome( $homeclass='home' ) {
    return uri::isHome() ? $homeclass : '';
  }
}


